5Aridon P, Ragonese P, De Fusco M, et al. Further evidence of genetic heterogeneity in familial essential tremor [ J ]. Parkinsonism Relat Disord, 2008, 14(1) : 15.
6Louis E D, Ferrerira J J. How common is the most common adult movement disorder Update on the worldwide prevalence of essentialtremor[J]. Mov Disord, 2010, 25(5): 534.
7Manto M. Laute M A. A possible mechanism for the benefi- cial effect of ethanol in essential tremor [ J ]. Eur J Neurol, 2008, 15: 697.
2Daniel JB, Charles FR, Timothy HM, et al. The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice practice and research. Psychiatry Res, 1988, 28: 193-213.
4Miller KM, Okun MS, Fernandez HF, et al. Depression symptoms in movement disorders : comparing Parkinson' s disease, dystonia, and essential tremor. Mov Disord, 2007, 22: 666-672.
5Louis ED, Barnes L, Albert SM, et al. Correlates of functional disability in essential tremor. Mov Disord, 2001, 16: 914-920.
6Bremner JD, Narayan M, An derson ER, et al. Hippecampal volume reductionin major depression. Am J Psychiatry, 2000, 157:115-118.
7Fahn S, Tolosa E, Concepcion M. Clinical Rating Scale for Tremor//Jankovic J, Tolosa E. Parkinson' s disease and movement disorders, 2nd ed. Baltimore: Williams and Wilkins, 1993 : 271-280.
8Louis ED.Etiology of essential tremor:should we be searching for environmental causes?[J].Mov Disord,2001,16:822-829.
9Ma S,Davis TL,Blair MA,et al.Familial essential tremor with apparent autosomal dominant inheritance:should we also consider other inheritance modes?[J].Mov Disord,2006,21:1368-1374.
10Shatunov A,Sambuughin N,Jankovic J,et al.Genomewide scans in North American families reveal genetic linkage of essential tremor to a region on chromosome 6p23[J].Brain,2006,129:2318-2331.
